How to: Normalize your audio for YouTube | Premiere Pro 2022

Step 1:
Right click the vocal audio track, and select “Audio Gain” –
**Make sure you are right clicking the audio tracks and adjusting the audio gain for every clip.

Step 2:
Select the “Normalize all peaks to: 0db” option

**** Additionally using limiters will help, on your vocal tracks, on your music tracks, and on your master track
Recommended Limiter settings:
Master Track
Maximum Amplitude: -2db
Input Boost: 4db
* additional effects
Multiband compressor: can make the mix sound more full and together, but not necessary
Background Music Track
Maximum Amplitude: -25db
Input Boost: 4db
* additional effects
Lowpass filter: Cutoff – 1000hz to 5000hz
Music Track
Maximum Amplitude: -2db
Input Boost: 0db
Vocal Track
Maximum Amplitude: -2db
Input Boost: 4db
* additional effects
Denoise: 5%
Dereverb: 5%

This video has some helpful tips as well, but -12db compression is for film, while commercial television/youtube is compressed closer to -2db, so use the recommended settings listed above for YouTube videos:
Limiters are DOPE! Adobe Premiere Pro 2020